Natures Grub Apple Cider Vinegar is unpasteurised and contains "mother", which is loaded with vitamins, minerals, and beneficial enzymes that can help to support the immune system of your flock. The acetic acid in our Apple Cider Vinegar can help to maintain a healthy gut environment and help promote the growth of good bacteria in the digestive tract,. This helps to support overall digestion and nutrient absorption. Regularly adding Apple Cider Vinegar to your chicken's water can actually make their intestinal tract less favourable for parasites, potentially reducing infestations of internal parasites, like worms. Composition - We only use 100% Apple Cider Vinegar, nothing else is added or taken away. Feeding guide - You can simply add our Apple Cider Vinegar to your chicken's drinking water. We recommend adding 20ml per 1litre of water.